[Enhancement] Write combined txn log parallel (backport #55143)

[mergify]

Why I'm doing:

If the import task involves multiple partitions, the combined transaction log will be written one by one, which may slowdown the import speed.

What I'm doing:

Write combined txn log parallel

write combined txn log for 100 partitions.
before this pr

I20250110 15:44:43.331159 139757477246720 tablet_sink_sender.cpp:384] write_combined_txn_log non-parallel cost time: 1545

after this pr

I20250110 15:46:47.941779 139757477246720 tablet_sink_sender.cpp:376] write_combined_txn_log parallel cost time: 140

Fixes #issue

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
• This is a backport pr

[mergify]

Cherry-pick of af3d78f has failed:

On branch mergify/bp/branch-3.3/pr-55143
Your branch is up to date with 'origin/branch-3.3'.

You are currently cherry-picking commit af3d78f12f.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   be/src/common/config.h
	modified:   be/src/exec/tablet_sink_sender.cpp
	modified:   be/src/exec/write_combined_txn_log.cpp
	modified:   be/src/exec/write_combined_txn_log.h
	modified:   be/src/runtime/exec_env.cpp
	modified:   be/src/runtime/exec_env.h
	modified:   be/test/CMakeLists.txt
	new file:   be/test/storage/lake/write_combined_txn_log_test.cpp

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   be/src/storage/lake/tablet_manager.cpp

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[mergify]

@mergify[bot]: Backport conflict, please reslove the conflict and resubmit the pr